Friction dbaft-gkeab fob



I. S. NAERY.

FR|cT|oN DRAFT GEAR FOR RAILWAY CARS.

APPLICATION FILED SEPT. 7 I9I.

Patented May 20, 1919.

A gwucnfoz 4 jwf A' E, REAR E ST ES JOHNv s.

NA'ERY,. 0F LA FAYETTE, INDIANA.

FRICTION DRAFT-GEAR FOR RAILWAY-CARS.

Specification of Lettersilatent.

Patented' May 20, 1919.

' Application filed September 7, 1917. Serial No. 190,228,

To all 'whom t may concern:

Be it known that I, JOHN S. NAERY, a citizen of the United States, and residing at La Fayette, county ofTippecanoe, State of Indiana, have invented certain new and useful Improvements in Friction Draft-Gears for Railway-Cars, of which the following is a specification.

This invention relates to draft riggings for railroad cars and coniprises'an improvement in draft riggings of the friction type in which the draw bar of the car is engaged by friction devices which absorb the sudden shock caused in the coupling of cars and protect the :framework and running gear from injury.

The object ofthe invention is to provide a draft rigging of this class whichis simple 4and inexpensive to construct andy apply to railroad cars, which renders unnecessary theheavy springs and friction blocks found on other devices of this description, and in which the aibility of the apparatus to absorb shocks is directly proportional to the weight of the carl The invention will be fully' disclosed in the following description, taken in connection with the accompanying drawings, in

which'-d Figure 1 is a top view of the apparatus part being broken away; Fig. 2 is a sectionV along the line 2-2 of `Fig. 1; v

Fig. 3 is a section along the line 3 -3 of Fig. 1; and Fig. 4 is a section of a modified form of friction device. he car body-is not shown nor ythe trucks supporting the saine as these features' are oid and well known, but a portion of thel car door is indicated` by the numeral 10 in the drawings and the, truck bolster is indicated hyeil. Directly above ster' is the transverse body bolster 12 and the twobolstei's are pivotally connected together by the center pin 13 in the usual manner.

The'body and truck holsters have center plates 14 and 15 respectively securely 1bolted thereto through each of which tlie center din 13 passes, and these center plates instead of hearing against/each other or against intermediate anla-friction devices as is usually the case. bear against the opposite faces of Qlie friction plate. Qr yoke 16 pivotally connected to the draw bar 17 at 18. Thus the I friction yoke 16 sup-ports tudinally of the car at Vand has the coupler the truck bol# of the carand it may only be moved by irnpacts against the coupler and draw bar which are of such magnitude as to overcome the great frictional resistance caused b-y the weight of the car pinching or clamping the friction yoke between the center' plates 14 and 15. y

The friction yoke 16 has two parallel arms, one of which passes on each side of the center pin 13 and each of the arms lies in directly the weight a slot 19 in the truck bolster center plate 15 so that the yoke cannot become accidentally displaced. f

As the yoke is held substantially longiall times by the draw bar, while the truck bolster and center plaite rotate as the car moves around curves, I have tapered the slot19 toward the center from each side of the plate so that the yoke will have sufficient play. The forward end of the yoke 16 is forked, one arm extending I over, and the other under the rear end of the draw bar 17. The pin 18Y passes through each of these forks and Athrough the draw bar, providing a substantial pivotal Connec.

The draw bar extends to the end of the car between the -usual 'sills or channels 20 21 secured to the end thereof. A portion of the draw bar between the coupler 21 and the pivot 18 comprises a yoke within which the followers 22 and 23 are held. These followers have between them the heavy coil spring 24 which assists the friction yoke in absorbing shocks inasmuch as the cheek plates 25 secured tothe sills 2O limit the motion of the followers in the usual manner, and insure that the spring 24 is compressed when the draw bar is moved in either direction.

sol

vln Fig. 4 l have shown a modification in i which anti-friction rollers 26 are placed between the friction yoke and the two center plates in case it is desired to decrease the friction. It is apparent that the degree of resistance offered to the passage of the friction yoke between the center plate depends uponthe Weight of the car and its load. This is a very desirable feature inasmuch as the heavier the car is the greater the jar it is capable -of giving and the greater theshock absorbing power should be.

1When my invention is used' the heavy Ishocks 'transmitted by4 switching or in train service, do not in any way damage the draft sills or gear, or affect the loading, and a great saving in upkeep is made, as lWell as an original saving in installation over other devices of this character.

Having thus described the invention what is claimed as new yand desired to be secured by Letters Patent is y 1. The combination with a railroad car having a body bolster and a truck having a bolster, of a draft rigging including a slid! able member resting on the truck bolster and in turn supporting the body bolster whereby movement of the member is frictionally re- 4-sisted by its contact with said bolsters.

. ber `is friet-ionally resisted by its contact with said bols/ters. K

3. The combination Witha railroad car having a draftriggir'igl including means to yieldinglyr resistrnovement therebf, of a 'member secured to said rigging and extending rearwardly between the bodyV and truck holsters and acting to 'transmit the Weight of the car from the body to the truck bolster Wlrereby movement of the member is fric: tionally resisted vin proportion to the Weight of Ithe car.

4. The combination with a railroadl car having transverse Ibody and truckbolsters and` a center pin pivotally securing them together, of a draft rigging therefor, compris- 'ing a draw bar, a yoke plate pivotally seey cured to said draw bar an'd having itsarms 3 extending ,between said bolsters on opposite sides of said center pin, said yoke plate be; ing subjected to the direct Weight of the ear.

5. The combination with a railroad car having a transverse body bolster and a truck therefor having a bolster, of a draft rigging comprising a draw bar and an extension plate secured thereto and extending between.

said body l'lfmlster and sai-d truckbolster Where i=t is subjected to the direct Weight of thecarand aptifriction means between the4 extension plate and .bolsters y In testimony whereof I aix my signature.

' JOHN S. NAERY. 

